Combined latch and lock



(No Model.)

S. F. ESTELL.

COMBINED LATCH AND LOOK.

N 335,064. Patented Jan. 26, 1886.

N. PFI'ERS. PhutmLRhognphnn Waihinghn. D. C.

UNTTE PATENT PW SAMUEL F. ESTELL, OF CHICAGO, ILLINOIS.

COMBINED LATCH AND LOCK.

SPECIFICATION forming part of Letters Patent No. 335,06, dated January 26, 1886.

Application filed October 30, 1885. Serial No. 181,369. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL F. Es'rnLL, a resident of Chicago, in the county of (look and State of Illinois, have invented certain new and useful Improvements in a Combined Latch and Look; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in a combined latch and lock, and is fully described and explained in this specification, and shown in the accompanying drawings, in which- Figure l is a plan of my improved lock, the top plate of the case being removed, and also one of the tumblers; Fig. 2, a plan of the top" plate, with dotted lines showing position of knob-catch; Fig. 3, a plan of one of the tumblers; Fig. 4, a plan of the front partof the extensible bolt forming part of the lock; Fig. 5, a plan of the rear part of said extensible bolt; Fig. 6, a view of the bolt and its connected parts, looking in the direction indicated by the arrow at in Fig. 1, together with a section of the case, the section being through the line at 1, Fig. 2; Fig. 7, a section of the top plate of the case and the knob-catch attached thereto, the plane of section being through the line :0 1 Fig. 2; Fig. 8, a side elevation of the key by means of which the bolt may be extended; Fig. 9, a similar view of the latchkey.

Fig. 1 shows the two parts of the bolt in their normal position and relation with reference to each other, and Fig. 6 shows the two parts extended or lengthened to form a the front end of each of the tumblers is alonlook.

In these figures, A is the bottom plate, A

the top plate or cover, and A the front edge or rim, of a rectangular lock-case, the parts being held together by means of a lug, a, on the front end of the top plate, which enters a corresponding recess in the rim A, and by a screw, 8, which passes through holes 8 s in the plates A A. This method of connecting the parts, being well known, is not essential, but may be replaced by any other suitable fastenings. Within the case is a longitudinallyreciprocating bolt, consisting of two parts, BB, connected by tumblers O C, in the manner hereinafter set forth, the two parts of the bolt and one of the tumblers which connect them being shown together in Fig. 1 and separately in Figs. 3, 4, and 5. The front end of-the part B of the bolt lies in a suitable opening in. the rim A, through which it projects to form a latch adapted to engage with a catch of suitable form and within the case one face of said part B is provided with a flange, :b, having its inner edge beveled to form a dovetail groove. Near the center of the dovetail groove is a stump, D, fastened rigidly in place and extending through the part B of the bolt, on both sides of which it projects, as shown in Fig. 6. The front end of the rear part,.B, of the bolt is a beveledged tongue, Z), ofsuch width as to fit and slide smoothly in thedovetail. groove of the of the'case. The sleeve E is provided with wings E, which rest against a flange, B, on the rear B11(lOf..l1llG part B, and the rotation of the sleeve E with its wings E forces the flange B and the bolt B B backwardor away from the rim A of the case.

On a pin, P, set in the rear part, B, of the bolt, and extending through the same, are pivoted two similar tumblers, O O, lying on opposite sides of the two-part bolt B B. In

gitudinal slot, 0, and at the rear end of said slot and in the upper margin thereof is a notch, 0, each of the slots 0 and notches c being of substantially the same width as the stump D. \Vhen, the bolt B B is not extended, (that is, when the parts are in the positions shown in Fig-1,) the stump lies in the notch a of each of thetumblers; but when the bolt is extended and its parts are in the positions shown in Fig. 6 the stump lies wholly in front of the tumblers, in the position shown in dotted lines in Fig. 3. hen. the bolt is extended the end 0 of each tumbler forms a stop to prevent longitudinal movement of the parts B B with reference to each other, and when the bolt is not extended the notch 0 answers the same purpose.

A spring, S, is fastened at its front end to the lock-case, and at its rear end is provided with a loop,which engages with hooks c on the tumblers. This spring performs the double office of rotating the tumblers C 0 about the pivot P, and at the same time drawing forward the tumblers and the entire two-part bolt B B. A. pin, I set in the part B of the bolt acts as a stop to preventthe rotation of the tumblers be yond their desired working position, and the spring S and pin I coact to preserve the engagement of the tumblers and the stump D.

It is evident that when the bolt B B is not extended it may be drawn back wholly within the front face, A, by turning the sleeve E or the ordinary knob-spindle,F,which lies Within and passes through the sleeve. It may also be withdrawn by means of the latch-key K, (shown in Fig.9,) which is provided with a single working-ward, wt If this key be inserted either in the key-holeH of the plate A or the similarly-placed key-hole H of the plate A, the ward 10 lies midway between the two plates A A. The bolt B B and tumblers G O are also placed symmetrically with reference to the plates A A, and if the key Kbe rotatedin the direction indicated by the arrow a, Fig. 1, the ward to enters a notch, N, in the edge of the bolt B, and forces backward the bolt BB and tumblers O C. When it is desired to convert the bolt B B into a night-latch, and thus necessitate the use of the key K for throwing back the bolt, the sleeve E is locked against rotation by means of a sliding catch, A,which lies 6n the inner face of the plate A, and may be moved into or out of engagement with a notch, E, in the sleeve at pleasure. The catch A is provided with a knob, A, which lies outside the case and affords a means of operating the catch.

The amount of movement communicated to the bolt B B by the latch-key K or by the rotation of the sleeve E is just sufficient to withdraw the bolt wholly within the case when the two parts B B are in the relative positions shown in Fig. 1. It is frequently desirable to so vary the position of the parts that the bolt cannot be wholly withdrawn within the case either by the latch-key or the sleeve E. In other words, it is desirable to convert the device shown from a day-latch or night-latch into a lock.

It is evident that if the front end of each of the tumblers O G be raised until the notch c is free from the stump D the front part, B, of the bolt B B can be moved forward with reference to the rear part, B, until the stump reaches the front end of the slot 11, when the tumblers may be allowed to drop down and secure the parts in their new positions, and it is further evident that when the part B of the bolt is thus moved forward with reference to the part B the throw of the key K or of the sleeve E will not be sufficient to withdraw the extended bolt wholly within the case. This extension of the boltis accomplished by means of the keyK,(shown in Fig.8,) which has three working-wards-one long central ward, w, and two shorter wards, w, on opposite sides of the center. If this key K beinserted in either of the key-holesH H and rotated in the direction indicated by the arrow a, Fig. 1, (the parts being in the positions shown in said Fig. 1,) the central ward, to, enters a notch, N, in the edge of the part B of the bolt, and the wards to lie in the respective planes of the tumblers G 0. As the key is rotated, the wards w first raise the tumblers sufficiently to free the stump D from the notch c of each tumbler. At the instant when the stump is free from the notches the ward to strikes the front face of the notch N and throws the front part of the bolt forward until the stump reaches the end of the slot 12 in the tongue b,when the tumblers fall, and the front end, 0', of each tumbler drops just in rear of the stump and locks the two parts of the bolt with reference to each other. The front part of the bolt may again be retracted or brought into the position shown in Fig. 1 by turning the key K in the direction indicated by the arrow a, Fig. 1. The key K cannot be used as a latch-key, its only office being to throw the part B of the bolt forward or back with reference to the part B, and thus convert the device from alatch to alock, or vice versa, and,on the other hand, the only purpose of the key K is to throw the entire latch B B and the tumblers O C backward together.

I have already called attention to the fact that the bolt B B and tumblers G O are arranged symmetrically with reference to the sides of the lock-case, and that the wards of each key are also symmetrical. By means of this construction either key operates equally well from either side of the lock, as has already been shown in the explanation of the use of the keys.

It is evident that any number of tumblers may be used in the lock, and that so long as they are symmetrical with reference to the case, and the key-wards are also symmetrical, the keys may be operated equally well from either side of the lock. At the same time, however, a single tumbler may evidently be used, or a number of tumblers non -symmetrically arranged,without altering the operation of my device, except as to the use of the same key from either side of the look. I do not, therefore, intend to limit my invention to the use of any specific number or form of tumblers.

Having now described and explained my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a combined latch and lock, the combination,with a suitable inclosing-case,of a two part extensible bolt, one or more tumblers pivoted to one of said parts, and adapted to engage a stump on the other and lock the two parts with reference to each other, and two dissimilar keys, one adapted to extend or shorten ICC said two-part bolt, and the other to throw for ward and back the entire bolt and the tumbler or tumblers pivoted thereto.

2. In a lock and latch, the combinatiomwith a suitable case, of a two-part extensible bolt placed symmetrically with reference to the side walls of the case, a series of tumblers pivoted to the rear part of said bolt and symmetrically placed with reference thereto, and engaging a stump or pin on, the front part of said bolt, a single spring connecting said tumblers with the case, and adapted to hold the tumblers in engagement with said stump, and at the same time to draw forward the entire bolt and the tumblers attached thereto, and a key provided with a central ward, and a series of wards symmetrically arranged with reference to said central ward, said central ward being adapted to engage with the front part of said bolt and throw it forward or back with reference to the rear part thereof, and the remaining wards being adapted to act on said tumblers and disengage them from said stump during such move ment of the front part of the bolt.

3. The combination, with the two-part bolt B B, of the tumblers O G, pivoted to the part B and engaging the stump D on the part B, the case inclosing said bolt and tumblers, the spring S, connecting the case and the tumblers O O, and thekeys K Kone adapted to throw back the entire bolt and the tumblers attached thereto, and the other to throw the part B of the bolt forward or back with reference to the gage the notch E and lock the sleeveEagainst rotation, substantially as shown and described, 5 and for the purpose set forth.

5. The co1nbination,with a two-part bolt, B B, of astump, I), on one of said parts, and one or more tumblers, G, pivoted on the other of said parts, each tumbler having a square end adapted to abut against the stump D and prevent relative longitudinal motion of the parts B B when the bolt is extended, and having a slot, 0, open at one end, and provided at the other end with a notch, 0, adapted to receive the stump D andlock the parts B B against rel ative longitudinal motion when the parts B B are drawn together and the bolt is shortened.

In testimony whereof I have signed this specification in the presence of two subscrib- 6o ing witnesses.

SAMUEL F. ESTELL.

lVitnesses:

JOHN S. FIFIELD, WILLIAM JoY. 

